There are three main areas of resonance for the voice. The chest, the head and what I like to refer to as the middle. This is the mouth (soft and hard palate) and the back of the throat…..also known as the oropharynx.
This resonance happens easiest when you have a balance of chest register and head register (mix). If you are too much in a chest register coordination it is difficult to get this resonance, and same goes with too much of a head voice coordination. A good balance of the two will allow the larynx to adjust for effective middle voice resonance.
Check out this exercise to hear a good example of pharyngeal resonance. When you do the exercise you shouldn’t feel any strain in the throat. Just lift the cheeks slightly, and relax the jaw. http://soundcloud.com/beemusicstudios/the-shouty-singer